1. (2 pts.) One problem with organic equations is that we tend to focus on what
ID: 701420 • Letter: 1
Question
1. (2 pts.) One problem with organic equations is that we tend to focus on what is happening to one molecule at a time, we forget that there are many, many molecules undergoing COLLISIONS in the reaction. Assume you used exactly 1.5 g of 1-butanol in your reaction, calculate the number of moles, AND, give the number of MOLECULES of alcohol. You will need to know that a mole of a substance is equal to Avogadro's number (6.022 x 102) of that molecule. Give the number of molecules to 3 significant figures and do NOT USE SCIENTIFIC NOTATION, include all of the zeros in your number After each number write down the number of zeros you included in parentheses. For example, one of your answers was 6.022 x 1023, then you would write it as follows: 602000000000000000000000 (21 zeros). SHOW YOUR WORK and INCLUDE ALL UNITS! (2 pts) 2. (1 pt.) Determine the number of MOLES of starting alcohol you used in your experiment. Show all equations, all work and make sure to include all UNITS 3. (1 pt.) Determine the number of MOLES of starting sodium bromide you obtained in your experiment. Show all equations, all work and make sure to include all UNITS 4. (1 pt.) There are TWO reactants in your reaction. The one that has the smallest number of moles is called the LIMITING REAGENT, because it is not possible to form any more moles of product than this one if there are more moles of the other reagent you still can't form any more product than the number of moles of the reactant that is present in the smaller quantity, the limiting reagent. Which is the limiting reagent in your reaction, the alcohol or the sodium bromide? 5. (1 pt.) In YOUR reaction, each molecule of the limiting reacta IF the reaction proceeded perfectly each time. Theoretically you would get exactly the same n molecules of produ product, in moles. Give the nt would give one molecule of the product ct as you had of the limiting reagent. This is often called the theoretical yield of the umber of maximum THEORETICAL of the product of your reaction product, in moles.Explanation / Answer
1. Mass of 1 butanol used = 1.5g
Molar mass of 1 butanol = 74.1 g/gmol
Therefore number of moles of 1 butanol in the sample = mass/ molar mass = 1.5/74.1 = 0.020243 moles
Therefore the number of molecules = moles*Avagadro number = 0.020243*6.022*1023 = 1.219*1022
Therefore you may write the required answer as 121900000......19 zeroes
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